diff --git a/tracks/db/migrate/013_convert_preferences.rb b/tracks/db/migrate/013_convert_preferences.rb
index dca4b50e..0ae0fed1 100644
--- a/tracks/db/migrate/013_convert_preferences.rb
+++ b/tracks/db/migrate/013_convert_preferences.rb
@@ -3,12 +3,13 @@ class ConvertPreferences < ActiveRecord::Migration
   class User < ActiveRecord::Base; has_one :preference; serialize :preferences; end
 
   def self.up
+    ActiveRecord::Base.transaction do
       @users = User.find(:all)
       @users.each do |user|
         user.create_preference
         user.preference.date_format = user.preferences['date_format']
         user.preference.week_starts = user.preferences['week_starts']
-        user.preference.show_number_completed = user.preferences['show_number_completed']
+        user.preference.show_number_completed = user.preferences['no_completed']
         user.preference.staleness_starts = user.preferences['staleness_starts']
         user.preference.show_completed_projects_in_sidebar = user.preferences['show_completed_projects_in_sidebar']
         user.preference.show_hidden_contexts_in_sidebar = user.preferences['show_hidden_contexts_in_sidebar']
@@ -19,22 +20,25 @@ class ConvertPreferences < ActiveRecord::Migration
       end
       remove_column :users, :preferences
     end
+  end
 
   def self.down
-    add_column :users, :preferences, :text
-    @users = User.find(:all)
-    @users.each do |user|
-      user.preferences = { "date_format" => "#{user.preference.date_format}",
-                            "week_starts" => "#{user.preference.week_starts}",
-                            "no_completed" => "#{user.preference.show_number_completed}",
-                            "staleness_starts" => "#{user.preference.staleness_starts}",
-                            "show_completed_projects_in_sidebar" => "#{user.preference.show_completed_projects_in_sidebar}",
-                            "show_hidden_contexts_in_sidebar" => "#{user.preference.show_hidden_contexts_in_sidebar}",
-                            "due_style" => "#{user.preference.due_style}",
-                            "admin_email" => "#{user.preference.admin_email}",
-                            "refresh" => "#{user.preference.refresh}"
-                            }
-      user.save
+    ActiveRecord::Base.transaction do
+      add_column :users, :preferences, :text
+      @users = User.find(:all)
+      @users.each do |user|
+        user.preferences = { "date_format" => "#{user.preference.date_format}",
+                              "week_starts" => "#{user.preference.week_starts}",
+                              "no_completed" => "#{user.preference.show_number_completed}",
+                              "staleness_starts" => "#{user.preference.staleness_starts}",
+                              "show_completed_projects_in_sidebar" => "#{user.preference.show_completed_projects_in_sidebar}",
+                              "show_hidden_contexts_in_sidebar" => "#{user.preference.show_hidden_contexts_in_sidebar}",
+                              "due_style" => "#{user.preference.due_style}",
+                              "admin_email" => "#{user.preference.admin_email}",
+                              "refresh" => "#{user.preference.refresh}"
+                              }
+        user.save
+      end
     end
   end
 end